Fox Hills Outcrop

The Fox Hills Outcrop is a coal mine located in Boulder county, Colorado at an elevation of 5,499 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Fox Hills Outcrop

Commodity

Primary: Coal
Tertiary: Uranium

Location

State: Colorado
County: Boulder
District: Boulder-Weld Coal Field

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: R
Description: Denver Basin, Front Range Uplift

Type: L
Description: Idaho Springs-Ralston Shear Zone

Alterations

Not available

Rocks

Name: Sandstone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous

Name: Sandstone
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: RANGE OF RADIOACTIVITY-0.1-0.25 MR/HR
Analytical Data: BACKGROUND RADIOACTIVITY-0.03-0.04 MR/HR

Materials

Gangue: Limonite

Comments

Comment (Location): WITHIN 1 MILE NORTH OF MARSHALL LAKE ; INFO FROM LAND.ST :(1975)

References

Reference (Deposit): SPENCER, F.D., 1961, BEDROCK GEOLOGY OF THE LOUISVILLE QUADRANGLE, COLORADO: USGS MAP GQ-151

Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULL. 40, P. 82

Colorado Mining Photos

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.